AISend
AISend is a transactional email API aimed at developers and AI agents. It provides a REST endpoint for sending email with Node.js SDK and cURL examples, plus a dashboard for managing sending domains, templates, suppression lists, and delivery analytics. Domain setup covers SPF, DKIM, and DMARC verification so transactional messages such as password resets, receipts, and onboarding emails are more likely to reach the inbox. The service emphasizes observability and deliverability features: webhooks emit real-time events for sent, delivered, opened, clicked, bounced, and complained messages, while bounces and complaints are added to suppression lists automatically to protect sender reputation. A library of production-oriented templates covers onboarding, billing, receipts, alerts, and authentication flows. A distinguishing element is a built-in MCP (Model Context Protocol) server, allowing MCP-compatible assistants such as Claude and Cursor to send email, check message status, and validate addresses as native tools. The API is described as Resend-compatible, so migration can be done by changing the base URL and swapping the API key. Pricing is flat and published on the site: a free tier of 3,000 emails per month with one sending domain and no credit card, and a Pro plan of 50,000 emails per month at $14. The vendor states the product is used internally for its own applications' transactional email and recommends dual-sending and verification before fully cutting over from an existing provider.
- Category
- AI Agents
- Pricing
- Unknown
Problem solved
Sending transactional email reliably is difficult: developers must configure SPF, DKIM, and DMARC, handle bounces and complaints, track delivery events, and avoid spam folders, often across multiple tools. AISend consolidates sending, domain verification, suppression handling, delivery analytics, webhooks, and templates into a single API and dashboard, and adds an MCP server so AI agents can send and inspect email without custom glue code.
Use cases
- Sending password reset and email verification messages from an application
- Delivering receipts, invoices, and billing notifications
- Running onboarding and lifecycle email sequences
- Tracking delivery, open, click, bounce, and complaint events via webhooks
- Letting an AI agent or MCP client send email as a native tool
- Migrating from a Resend-compatible email API by changing the base URL
- Managing custom sending domains with guided SPF, DKIM, and DMARC setup
- Automatically suppressing bounced and complained addresses to protect sender reputation
Audience
- Developers
- ML Engineers
- Startups
Pros
- Free tier includes 3,000 emails per month and one custom sending domain with no credit card
- Resend-compatible request format allows migration by changing the base URL and API key
- Built-in MCP server exposes email sending, status checks, and address validation as agent tools
- Deliverability features such as SPF/DKIM/DMARC guidance, bounce handling, and automatic suppression are included
- Flat, transparent pricing with a Pro tier stated as cheaper than comparable Resend pricing
Cons
- No public GitHub repository or open-source components were found for review
- Vendor is new and states it has no customer case studies or logos yet
- Pricing for higher-volume or enterprise tiers is not detailed in the available page content
- Feature depth for advanced needs (dedicated IPs, complex analytics, multi-region sending) is not documented on the homepage
- Only a Node.js SDK and cURL examples are shown, so other language SDK coverage is unclear
Official website: https://aisend.app/
Canonical LambdaBase page: https://www.lambdabase.com/tools/aisend